Abstract

Nowadays, harmonic distortions and low Power Factor (PF) are serious problems that gained more importance in power electronics area. In this paper, Three phase PFC and harmonic mitigation using Active Power Filter (APF) topology and Buck-Boost circuit topology are realized. Here the nonlinear load considered is a 12 pulse diode bridge rectifier. First, harmonic mitigation and power factor correction is done by using a shunt Active Power Filter. Here, the strategy used to extract the three phase reference currents are based on the synchronous reference frame method and the control used is hysteresis control. Then another method of Buck-Boost converter topology for harmonic mitigation and power factor correction is also analyzed. Here the control is in such a way that to profile the rectifier output current to be triangular which results in low ac side harmonics. The switching frequency is set to 10 kHz. The simulation analyses are carried out in Matlab/Simulink software. The effect of APF and Buck-Boost circuit on PF and the sinusoidal nature of line current are analyzed by the simulation results.